Cylinder and piston construction



May I, 1923.

E. JOHNSON ET AL CYLINDER AND PISTON CONSTRUCTfON Filed April 13, 1922,

a I I k Inventor:

fla Frag? ELIAS JOHNSON AND SIMON PETERSON, 0F NEWHALL, IUWA.

CYLINDER AND PISTON CONSTRUCTION.

Application filed April 13, 1922. Serial No. 552,094.

T 0 all whom it may concern Be it known that we, ELIAS JOHNSON and SIMON PETERSON, citizens of the United States, residing at Ncwhall, in the county of Benton and State oflowa, have invented certain new and useful Improvements in mum, with the obvious advantages, and to provide a construction which is simple and strong.

Other objects'and advantages of the invention will. be apparent during the-course of the following description.

In the accompanying drawings forming a part of this specification, the figure is a central longitudinal sectional view through a piston cylinder embodying the invention.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of our invention, the numeral 1 designates the cylinder of an internal com'bus tion engine. This cylinder may be equipped with a head 2.

The numeral 3 designates a piston mounted to reciprocate within the cylinder, which piston is preferably of the hollow type with an upper closed head or end 4:. The piston is preferably equipped with packing rings 5.

Preferably formed integral with the upper end of the piston and its head 4 is an annular flange 6, the outer wall of which is cylindrical and constitutes a continuation of the outer wall of the piston. This increases the contact area between the piston and cylinder and serves to prevent'leakage of compression. It is preferred: that the flange 6 have itsface 7 inclined, and flaring outwardlytoward the upper end of the flange. This sharp edge serves to effectively scrape or remove carbon deposits from the interior of the cylinder. The numeral 8 desi nates a coactin annular flan e ref-' erably formed integral with the upper end of the cylinder, upon the interior thereof.

This flange is provided upon its bottom with a recess 9, tapered or V-shaped in cross section, and adapted to accurately receive and fit the flange 6 upon the rip-stroke of the piston. When the piston has reached the end of its upward movement, it will be seen that a tight joint is eliected between the substantially contacting faces of? the flanges '6 and 8, and this joint will prevent leakage of compression, to a considerable extent. I

It is obvious that'the invention is in no the flange 8, as this may vary somewhat with the construction of the engine, taking into consideration the location of the valves, etc.

lit is to be understood that the form of the invention herewithshown and described is to be taken as a preferred example of the same, and that various changes in the size, shape, form and arrangement of parts may sense restricted tothe precise location of be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described our invention, we claim:

1. In an internal combustion engine, a

cylinder provided with an interior flange, said flange being provided upon one side with a recess, the outer wall of saidrecess being cylindrical and forming a continuation of the inner wall of the cylinder, and a-piston mounted to reciprocate within the cylinder and provided at one end with a flange integral therewith, said flange projecting longitudinally beyond the piston ,and adapted to enter said recess in the first named flange, the outer wall of the piston flange" being cylindrical and forming a continuation of the outer wall of the piston.

2. In an internal combustion engine, a cylinder provided with an interior flange, said flange being provided with a recess upon one side. which recess is tapered in cross section, the outer wall of the recess being cylindrical andforming a continuation of the innerwall of the cylinder, and a piston mounted to reciprocate withinthe cylinder and provided near one end with a rigid flange projecting longitudinally-beyond the same, said rigid flange being tapered in cross section to fit within said recess,- said rigid flange having its outer wall cylindrical and forming a continuation of the outer wall of the piston.

3. in an internal combustion engine, a cylinder provided upon its inner wall with an annnlar flange integral therewith, said annular. flange having an annular recess is substantially V-shaped in crossseCtijSn, one wall of the recess coinciding with the wall of the cylinder and the other wall being inclined withrelation thereto, and a piston to reciprocate within the cylinder and provided at its closed end with a flange integral therewith said flange be- 10 ing substantially V-shaped in cross-section with its outer wall parallel with the inner wall of the cylinder and its inner wall inclined, the flange having its forward end sharpenedand said flange being adapted to enter said recess. J

In testimony whereof we aflix our signatures.

ELIAS JOHNSON. #:BIIVlON PETERSON. 

